Propelling mechanism for airships.



M. VANIMAN. PROPELLING MECHANISM FOR AIRSHIPS.

APPLICATION FILED MAY 3, 1 909.

Patented Jan.24, 1911.

11/71 111 W 6 v1 fl w which is shown in Fig. 1, is mounted on the car perpendicularly to the longitudinal one or two'screws a a, which in the lattercase, are mountedsymmetr cally one on each ,'b0X forming a bearing in which-the shaft an arrangement of screws applicab'le t0 dirigible balloons and to aeroplane-s, these screws locus or vaeroplanes in a horizontal plane,

planes.

is connected to the crank shaft 1; of a motor adapted to retain it and 'at the same time and (l.

, through a. bevel wheel It mounted upon the able manner upon .the gear case f, engaging 'with the said teeth. A crank Zor other de- MELVIN-VANIMAN, OF GENNEVILL-IERS, FRANCE.

' PROPELLING MECHANISM FOR AIRSHIPS.

Specification of Letters Patent.- Patented J an. 24, 1911.

Application filed May 3, 190B, SeriatNo. 493,658.

To all whom it may concern:

Be it known that I, Msnvix V .mnmx, a citizen of the United States of America, and resident of Gennevilliers, Seine, France, have invented new and useful Improvements in Propelling Mechanism for Airships', which improvements are fully set forth inthe following specification.

, The subject matter of this invention is serving for the propulsion of the said baland allowing,.when occasion arises, of their ascent ,and descentby moving in oblique The screw device is represented, by way of example, in the annexed dra\\'iugs.-

Figure '1 is a view, partly in elevation, partly in vertical section:- Fig. '2 is an end The device, the whole arrangement of median plane of the balloon.' It contains side of the can Each one of the screws 1 (1.

c which is suitably mounted upon the car, by means of an intermediate shaft-J passing through an'arm c.- The arm a, which is of -conical'shape, carries at its extremity a of the screw revolves, the large end of the said arm being disposed within a part of thecr'ank case f of the motor, which to allow its rotation on itsaxis, which coincides with the axis'ofthe crank shaft and with that of the intermediate shaft. A s'uit-' able coupling means 9 unites thesha'tts I; The movement'of,t.he motor is transmitted to each of the scrcwsc a'- extremity of the shaft d and engaging with another bevel wheel 2' mounted on the pro:- pcller shaft.

The device for imparting a certain rotary movement around the axis (1 to the arms ,'carries for each arm a' crown with helicoidal teeth which is rigidly connected thereto, an endless screwltfixed in any suitvice is adapted to impart to the screw k,

by hand or by means of some actuating dedisplacement of the arm.

' vice, the rotary movement necessary for the In starting the motor, assuming that the screw propellers a, a aremounted as shown in Fig. 1, that is to say, with their planes of gyration strictly vertical, it is obvious that'these-- screws will operate as actuating elements to displace the balloon ina horizontal plane. According to the direction of.rotation of the screws, it is possible to obtain an advance, or return. movement. On the other hand, if the cranks Z orother suitable elements are operated to imparta certain angular displacement to the arms c, the planes otgyration ot' the screws become oblique and the propulsion of the balloon is effected in a vertical plane in a direction v corresponding to an oblique line parallelwith the extended axes of the screws. --The balloon rises '01 descends according as the arms 0 are caused to turn in one or the other direction, and the degree of inclination of the progress of the balloon is ac; g0

centuated proportionately to the angular displacement given to the said arms.

It' the screw propellers are inclined either forward or backward, the horizontal displacement of theballoon' can still be obtained: if. in fact. for example, owing; to the warmth of the atmosphere the lifting power of the balloon increases, it is still mssible to eti'ect'the horizontaldisplacement of the balloon by dire-ting the-screwsso' as to produce a descending movement;'1f, on y the other hand,1t-he lifting power diminishes 1n con seqm-nce oi a cooling of the atmos- 'phere, the horizontal displacement ofthe balloon can still. be brought about-by dirouting the 'screws so com] in g\ e ll'ect.

Hitherto only a case in which the two, arms and, consequently, the two screws as to produce an asu, (1.. are displaced simultaneouslyhas been -dealt with, but it is obvious thatin orderto obtain certain stei'idying efi'ects any one a of the screws may be inclined in the direc-' tion suitable for readjus'ting the balloon.

All the described devices can, however, be-i05i arranged to allow of. the simultaneous displacement of the arms 0 inthe same direc tion or in opposite directions, or'of one arm to the exclusion of the other, in the same manner to .varylthe direction of movement of the screws independently. of one another.

,Gleim. l Me'chanismifon causing the elevation and d ression of propelling screws for dirigibie be Icons and aeroplanes, said mechanism tubular crank, cz se hav ng comprising a ofwen ends,- tubular members rotatably mounted on the ends of the crank case and aline'd therewith a crank shait extending .lon tudinaliy through the crank case and Lu larimembers, a'plurality of engine cylinders supported directly on the crank case, pistons operating therein, pitmen connect- 1 ing the pistons and cranks of the crank- EMILE Lnnnn'r, I DEAN B. MASON. 

